Place butter in 4- quart bowl; microwave at HIGH 1 to 1 1/2 minutes or until melted.
Stir in sugar and cocoa. Add cereals, pretzels and peanuts to butter mixture; stir until well coated. Microwave at HIGH 3 minutes, stirring every minute.
Stir in raisins; microwave HIGH 3 minutes, stirring every minute.
Cool completely. Store at room temperature in airtight container.